Where a creditor's petition is not prosecuted with due diligence or where for any other reason the Court considers it proper to do so, the Court may permit to be substituted as petitioner or petitioners another creditor or other creditors to whom the debtor is indebted in the amount required by this Act in the case of a petitioning creditor, and the petition may be proceeded with as if the substituted creditor or creditors had been the petitioning creditor.